diff --git a/Doc/library/dataclasses.rst b/Doc/library/dataclasses.rst
index 10edcac..a7fbaaa 100644
--- a/Doc/library/dataclasses.rst
+++ b/Doc/library/dataclasses.rst
@@ -23,7 +23,7 @@
 
   @dataclass
   class InventoryItem:
-      '''Class for keeping track of an item in inventory.'''
+      """Class for keeping track of an item in inventory."""
       name: str
       unit_price: float
       quantity_on_hand: int = 0